CVE-2023-34319

Advisory lineage Upstream: 0 Downstream: 46
Modified
Published: 22 Sept 2023, 13:34
Last modified:04 Nov 2025, 19:16

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Sept 2023, 13:34
Published
Vulnerability first disclosed
04 Nov 2025, 19:16
Last Modified
Vulnerability information updated

Description

The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 2%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    10.0

  • linux•linux_kernel

    ≥ 4.9.336, < 4.10 | ≥ 4.14.302, < 4.14.321 | ≥ 4.19.269, < 4.19.290 | ≥ 5.4.227, < 5.4.252 | ≥ 5.10.159, < 5.10.189 | ≥ 5.15.83, < 5.15.125 | ≥ 6.1.13, < 6.1.44 | ≥ 6.2, < 6.4.9

  • xen•xen

    ≥ 3.2.0

References (6)